Process of making sulfuric acid.



BEST AVAILABLE cop? 0. BENDER. PROCESS OF MAKING SULFURIG ACID.

APPLIGATION IILBD MAR. 24, 1908.

Patented 0013.6,1908.

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PROCESS OF MAKING- SULFURIG ACID. 7

no. eoo,css.

Specification of Letters Patent.

Patented Oct. 6, 1908.

Original application filed April 15, 1907, SeriahNo. 368,343. Divided and this application filed March 24, 1908.

Serial No.

To all whom it may concern:

Be it known that l, Oso xn Barman, engineer, of 12 Berlinerstrasse, Neu-Babelsberg, near Berlin, Kingdom of Prussia, Germany, have invented new and useful Improvements in Processes of Making Sulfuric Acid, of which the following is a specification.

The present invention refers to a process for making compounds of oxygen and sulfur (sulfuric acid, sulfuric anhydrid) directly from the elements at a high temperature and is a division of my application filed April 15, 1907, Serial No. 368,343. I The process consists in the oxygen or oxygen bearing gases being heated with sulfur or dioxid of sulfur by a furnace to a high temperature, whereupon the hot gas-mixture is still further heated by an oXy-hydrogen flame. The oxy-hydrogen is suitably produced by superheated steam bein blown into the hot space. The steam wil dissociate at the high temperature and the oxyhydrogen produced will mix with the heated gases. .When this mixture begins to cool the hydrogen is united with the oxygen in an oxy-hydrogen flame, which still further heats the reaction mixture and produces the uniting of the oxygen with the sulfur. The oxids thus produced are thereupon drawn oifby a cooler currentpf steam, whereby the yield is more favorably influenced.

An arrangement, which might be employed for carrying out this process is shown Figure 1 is a longitudinal section, Fig. 2 a transverse section along X-X in Fig. 1.

The producer A made of fire-proof material and suitably ,well insulated has at its upper end a hopper 0 for charging the'fuel. In the lower part of the generator-shaft is on. The tube 6, arranged below the grate serves for the supply of atmospheric air, compressed air, oxygen and other substances required for the reaction. A second tube g vided above the grates. Passages h produce a communication between the space below the grate an'd the space above the fuel. These assags' may also pass through the fuel. 1 tubes maybe entirely or partly closable by means of valves, slides or the like q, 1'. Above the fuel where the tempera ture is highest an, annular bent tube '0 is fitted into the Wall Of the producer which communicates by an annular slot (1 with the interior of the producer and by tube 1) with a steam generating plant of any kind, so that it is possible to introduce high-pressure and superheated steam from all sides into the producer in a disk-like thin stream, and a point where the furnace produces under a strong draft the highest temperature, which can evenbe increased by supplying oxygen through tube g. The thus produced disk of steam which will fill out the whole section of the producer-shaft, is ina completely-dissociated state, so that a little above this zone, where the gases have cooled down a little, say at B an oxy-hydrogen flame is produced, which will by its extreme heat still further heat the already heated substances mentioned above. A window 1) allows of observing the reactions going on'ln the upper part of the producer.

For carrying off the products the tube is is provided, which may communicate by a slide or the like n with the passage 0 leading to the chimney. Into the exhaustipe 7c is fitted a tube 1 with a nozzle m, whic serves to supply steam of a lower temperature, which flows in the direction of the escaping gases. This steam-jet produces a suction of the gas-mixture, a thorough mixing and at the same time by its lower temperature a cooling to such an extent, that the oxygencompounds produced will not dissociate, after being thus mixed and cooled.

For carrying out the process, the producer is charged with alayer of coal and sulfur is su plied either below the grate or by mixing su fur among the fuel, which will burn on the grate to dioxid of sulfur, or sulfurous oxid is introduced through tube 0'. or g. Oxygen on atmospheric air, which is suitably enriched with oxygen, is introduced in large quantities beneath the grate, say by means-of a fan. On passing through the coal the air is de-. prived of the greater part of its oxygen, itis therefore advisable to replace such oxygen by introducing further quantities above the, grate. By arranging fire-prooftubes or the like in the coal or by-passes, passages may however be created through which un-' changed air may pass from below .into the upper part of the pfioducer. Owing to the great surplus of oxygen the combustion is perfect and in the space above the grate a highly heated gas-mixture of carbon'icacid, oxygen and sulfurous acid is produced.

' heated into this 'mixture the partly dissociated steam escaping from tube a is introduced, containing still hydrogen and oxygen in stain nasccndi. in its up per portion with fire-bricks for ducinga heat accumuiator. The more above 1000 the temperature is, the better the steam is dissociated and the more nascent oxygen is obtained. Somewhat above tube 0 an (my-hydrogen flame isproduced by the cooling of the gases, Which flame will by its extreme heat still further heat the already highly heated gases. Into the escaping gas mixture a steam-jet of lower temperature is introduced through nozzle m. This nozzle produces a suction and at the same time by its low temperature a cooling and fixing of the sulfur-oxygen compound; produced.

hen nitrogen present, besides the oxids of sulfur also xygcn-compounds of nitrogen are produced, which have a favorable inl'luonce on the production of the sulfuric acid.

I claim 'i A, process of making sulfuric acid which consists in. heating sulfur dioxid, oxygen and nitrogen first by the fire of a carbonaceous fuel and then by an oXy-hydrogen flame, whcrciu'ion the products of reaction are cooled at once and drawn off.

2. A process of making sulfuric acid which consists in heatii'lg sulfur dioxid, oxygen and nitrogen by the fire of a carbonaceous fuel and then by an oxy-hydrogcn flame, the oxyhydrogen being produced from steam supery the fire of the furnace blown into the heat pace above the fuel, the products of The producer may be lined reaction being finally cooled immediately and drawn o'll'.

3. A process of making sulfuric acid consisting in heating sulfur dioxid, oxygen and nitrogen by the fire of a carbonaceous fuel and then by an oXy-hydrogen flame, the oxyhydrogen being produced from steannblown into the heat space above the fuel and superheated thereby, the products of reaction be ing finally cooled immediately by a cooler steam current and drawn oil.

4. A process of making sulfuric acid which consists in heating sulfur dioxid, oxygen and nitrogen by the iire of a czn'bonaccous fuel and then by an oxy-hydrogen ilame, the

oxy-hydrogen being produced by steam superheated by the fire of the furnace, said steam being blown into the heat space above the fuel, the products of the reaction being iinally cooled immediately and drawn oil' by a cooler steam current flowing in the direction of the escaping gases.

5. A process of making sulfuric acid consisting of heating sull'ur dioxid, formed by burning sulfur With oxygen and nitrogen by the iire of a carbonaceous fuel and then by an (my-hydrogen i lame, the products of reaction oif in testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

OSCAR BENDER. Witnesses HENRY Ihsrnn, VVOLDEMAR HAUPT.

being finally cooled in'unediately and (lrawlr 

